No option for private replies

bbpress 2.2.4
private replies 1.0

Pretty simple, plugin activated and nothing appears.

http://www.sunshinephotocart.com/forums

http://screencast.com/t/TWBmthNFG1 – plugins activated
http://screencast.com/t/YbyGYBHy – no private reply checkbox

http://wordpress.org/extend/plugins/bbpress-private-replies/